WPS Backup 10/08/2012 Wiggins Pass Sub-Committee Meeting-10/8/2012
1. What is being considered at the BCC meeting tomorrow?
a. Item 11C-Special Treatment Overlay Permit approval.
b. Previous approvals EAC and the Planning Commission
c. LDC—St Overlay Commitments.
2. Outstanding issues and Concerns
a. FDEP Permit
i. FDEP has deemed the Permit application complete—Ready to issue permit.
ii. ST Overlay permit required for County to write The Letter of Consistency.
iii. Letter of consistency is required prior to the FDEP permit issuance
iv. Language on sand distribution with the State Park
b. USACE
i. Biological Opinion for Piping Plovers—FWS—Critical Path
ii. Biological Opinion for Sea turtles - NMFS has recommended a dredge cycle
during Daylight Hours only— resolution required
iii. Army Permit drafted after FDEP permit and all BO are resolved
c. Peer Review
i. Notified that a peer review of design is required by County Management
ii. Olsen Associates from Jax to conduct.
iii. 8 weeks required with target completion date of 12/15/12
iv. Modifications to design may be required but not anticipated.
d. Technical items of concern
i. Hydraulic prism and pressure of straightened channel
ii. Dredge cut of Channel
iii. Time Value analysis of money
iv. Independent dredging
3. Probable schedule
a. All work must be completed by the beginning of turtle nesting season on 5/1/13.
b. NMFS 12 hour dredge requirement is a project killer.
c. NMFS BO for turtles resolution by 11/15/12
d. FWS BO for Piping Plovers by 12/15/12
e. Peer review by 12/15/12
f. Letter of consistency by Collier County by 11/1/12
g. FDEP permit by 12/1/12
h. USACE permit by 1/15/13
i. Bid package and bidding complete by 2/1/12
j. Presentation to BCC by 2/12/13 for award
k. Mobilization and begin Dredging by 3/1/13
I. Substantial completion by 5/1/13 (All work complete)
m. Cleanup and demobilization by 5/15/13.
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Bottom Depth(ft) Overdredge
Station Location Width(ft) NAVD Depth(ft)
Corps 1980 Ebb Channel 150+100 -13.3 1.0
Throat * +50-150 -10.3 1.0
Flood Side
Channel 50 -9.3 1.0
2000-7 Permit Ebb Channel 250 -13.3 1.0
Throat 150 -8.8 1.0
Flood Side
Channel 125 -6 0.0
2011 Dredge Ebb Shoal 200(170') -13.0 1.0
Throat 150 -8.7 1.0
Proposed 2010 240 160 12.0
Permit Ebb Channel * 1.0
Throat 160 -12.0 1.0
Flood Channel 130 -7.7 1.0
o -
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Z I
I _ 1
i
S
ti / —1)/ -
/
-15 - — \ /
\ I
\ I Hard Substrate-Known
\ /
\ / -- Gap In Hard Substrate
\
\\ I 2010 Proposed Channel
S%
-20 \ 1 En sting Channel
\ I
\ I Sandy Bottom
\ /
\% / —2011 Proposed Channel
% I
-25
-300 -200 -100 0 100 200 300 400
4 South Distance From South Edge of 2010 Channel North
Figure. The 2010 dredged dimension versus
the prelimary and final plan cross section at Station 1+00.
toy
2
Wiggins Pass Sub-Committee Meeting-10/8/2012
1. What is being considered at the BCC meeting tomorrow?
a. Item 11C-Special Treatment Overlay Permit approval.
b. Previous approvals EAC and the Planning Commission
c. LDC—St Overlay Commitments.
2. Outstanding issues and Concerns
a. FDEP Permit
i. FDEP has deemed the Permit application complete—Ready to issue permit.
ii. ST Overlay permit required for County to write The Letter of Consistency.
iii. Letter of consistency is required prior to the FDEP permit issuance
iv. Language on sand distribution with the State Park
b. USACE
i. Biological Opinion for Piping Plovers—FWS—Critical Path
ii. Biological Opinion for Sea turtles - NMFS has recommended a dredge cycle
during Daylight Hours only— resolution required
iii. Army Permit drafted after FDEP permit and all BO are resolved
c. Peer Review
i. Notified that a peer review of design is required by County Management
ii. Olsen Associates from lax to conduct.
iii. 8 weeks required with target completion date of 12/15/12
iv. Modifications to design may be required but not anticipated.
d. Technical items of concern
i. Hydraulic prism and pressure of straightened channel
ii. Dredge cut of Channel
iii. Time Value analysis of money
iv. Independent dredging
3. Probable schedule
a. All work must be completed by the beginning of turtle nesting season on 5/1/13.
b. NMFS 12 hour dredge requirement is a project killer.
c. NMFS BO for turtles resolution by 11/15/12
d. FWS BO for Piping Plovers by 12/15/12
e. Peer review by 12/15/12
f. Letter of consistency by Collier County by 11/1/12
g. FDEP permit by 12/1/12
h. USACE permit by 1/15/13
i. Bid package and bidding complete by 2/1/12
j. Presentation to BCC by 2/12/13 for award
k. Mobilization and begin Dredging by 3/1/13
I. Substantial completion by 5/1/13 (All work complete)
m. Cleanup and demobilization by 5/15/13.
Ulm
ID iSii
COLLIER COUNTY
Board of County Commissioners
Item Number: 11.C.
Item Summary: This item requires that ex parte disclosure be provided by Commission
members. Should a hearing be held on this item, all participants are required to be sworn in.
Recommendation to approve a resolution relating to Petition Number ST-PL2012-168 for a
Special Treatment Development Permit to dredge and fill on State-owned property in the
vicinity of Wiggins Pass channel zoned Agricultural and Conservation with Special Treatment
Overlays (A-ST and CON-ST) in Sections 17, 18 and 20,Township 48 South, Range 25 East,
Collier County, Florida.(Stephen Lenberger, Senior Environmental Specialist, Growth
Management Division)
Meeting Date: 10/9/2012
Prepared By
Name: LenbergerSteve
Title: Environmental Specialist, Senior,Engineering& Env
9/4/2012 3:59:06 PM
Approved By
Name: PuigJudy
Title: Operations Analyst, GMD P&R
Date: 9/7/2012 11:13:11 AM
Name: KurtzGerald
Title:Project Manager, Principal,Transportation Engineer
Date: 9/11/2012 5:54:03 PM
Name:LorenzWilliam
Title:Director-CDES Engineering Services,Comprehensive
Date: 9/18/2012 11:06:35 AM
Name: AshtonHeidi
Title: Section Chief/Land Use-Transportation,County Attor
Date: 9/18/2012 4:22:59 PM
Name:MarcellaJeanne
Title:Executive Secretary,Transportation Planning
Date: 9/27/2012 8:23:10 AM
Name: FinnEd
Title: Senior Budget Analyst, OMB
Date: 10/1/2012 10:13:47 AM
Name: KlatzkowJeff
Title: County Attorney
Date: 10/1/2012 11:02:04 AM
Name: OchsLeo
Title: County Manager
Date: 10/2/2012 3:52:18 PM
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EXECUTIVE SUMMARY
Recommendation to approve a resolution finding petition Number ST-PL2012168 for a
special treatment development permit to dredge and fill on state-owned property in the
vicinity of Wiggins Pass consistent with the Agricultural and Conservation Special
Treatment Overlays (A-ST and CON-ST) and issue the permit. The project is located in
Sections 17, 18 and 20, Township 48 South,Range 25 East, Collier County,Florida.
OBJECTIVE:
To have the Board of County Commissioners (BCC) take final action on a Special Treatment
(ST) permit for a project known as the Wiggins Pass Maintenance Dredging and Navigation
Improvement Project.
CONSIDERATIONS:
The Wiggins Pass Maintenance Dredging and Navigation Improvement Project is a non-
structural solution designed to improve navigation and to address the erosion issue at Barefoot
Beach. This project will not involve removal of any native vegetation or wetlands, and avoidance
measures will be incorporated during dredging to avoid impacts to seagrass resources. The
proposed project will re-establish a historic location of the flood channel: the new flood channel
will be relocated to where the flood channel was located in the last 60-80 years. Overall, the
proposed project consists of an initial dredging, major maintenance dredging every 4 years, and
minor maintenance dredging in between, for a total volume of approximately 214,000 cubic
yards over a ten-year period. The existing 1995 Wiggins Pass Inlet Management Plan requires
dredging at least 50,000 cubic yards every 2 years, for a total cumulative volume of at least
300,000 cubic yards every decade. The proposed plan will require approximately 86,000 cubic
yards less material to be dredged over a ten-year period when compared to the 1995 Plan.
The proposed design modifies and improves upon the County-approved 1995 Wiggins Pass Inlet
Management Plan. This project includes channel realignment which will be accomplished by
straightening the inlet channel layout and infilling and blocking the northern flood shoal
meander. The east, north, and south interior channel entrances are identified for maintenance
dredging, should sand shoal within their respective boundaries. The designated dredge disposal
locations and distribution will be modified and relocated based on shoreline monitoring results,
with preference given to areas with greatest need. Incorporating the ability to modify disposal
locations will increase management flexibility, reduce sediment loss to the system, and minimize
impacts to Barefoot Beach and Delnor-Wiggins Pass State Park shorelines. Nearshore and beach
(onshore) disposal areas are located north of the inlet between Florida Department of
Environmental Protection (FDEP) R-Monument Markers R-12 to R-15.5 and south of the inlet
between R-18 and R-20. An ebb shoal disposal area has also been designated to assist in
stabilizing the Barefoot Beach shoreline. A separate offshore disposal area (Borrow Area 6 from
the 1996 Beach Nourishment Project) has been designated as an acceptable location to place
unsuitable fill dredged from the channel. All disposal areas are state-owned property. The project
also includes scarp repair along southern Barefoot Beach to restore the beach to historic
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conditions. A dynamic design will be incorporated into the maintenance plan for the inlet so that
long-term dredging can be reduced.
Florida Department of Environmental Protection has reviewed and approved this design and is in
the final stages of issuing a permit. In addition, Collier County will be soliciting an independent
peer review from Olsen Associates, Inc. This review will be completed by mid December 2012.
The findings of the peer review will be presented for board considerations with the approval of
the contract.
According to the Land Development Code (LDC), the purpose of the ST Overlay is for the
conservation, protection, and preservation of ecological and recreational values of
environmentally sensitive land within the Overlay and at the same time, to permit those types of
development which hold changes to levels determined acceptable by the BCC after public
hearing (2.03.07 D LDC). Procedures in the LDC for site alteration plan and site development
plan approval require recommendations of staff, Environmental Advisory Council (EAC) and
Collier County Planning Commission (CCPC) to be forwarded to the BCC for final action. The
LDC does not require that the public hearings be legally advertised or that notice be provided to
abutting property owners (4.02.14 LDC). The project encompasses ST Overlays as depicted on
the attached ST Overlays Exhibit.
FISCAL IMPACT:
There is no direct fiscal impact due to the approval of the ST Permit. The fiscal impacts to the
County will occur at time of construction. The Natural Resources Department will identify the
capital and recurring costs at the time of award of the construction contract.
Funding for this project will be from Tourist Development Tax Category A, Fund 195. This
project is scheduled to be bid in January, 2013 and has an estimated cost of$1.7 million. The
final award will be subject to board approval of the contract.
GROWTH MANAGEMENT PLAN (GMP) IMPACT:
Future Land Use Element (FLUE): The proposed dredging area is located within the
Conservation designated area on the countywide Future Land Use Map, and within the Coastal
High Hazard Area.
The Future Land Use Element does not specifically address dredging. However, the proposed
dredging is intended to restore and stabilize eroded shorelines, protect native vegetation and
wildlife, improve inlet navigation, improve estuary flushing, improve water quality, and enhance
recreational opportunities. These functions are generally promoted and supported in certain
Goals, Objectives and Policies of the Future Land Use Element (and Recreation and Open Space
Element and Conservation and Coastal Management Element) of the Growth Management Plan
and allowed by the Conservation designation. Therefore, the Comprehensive Planning staff is of
the opinion that the proposed project does not conflict with the Goals, Objectives and Policies of
the Future Land Use Element.
V)\1 1
Conservation and Coastal Management Element (CCME): Staff finds the Wiggins Pass
Maintenance Dredging and Navigation Improvement Project to be consistent with the CCME.
Please see the EAC and CCPC Staff Reports for information with regards to this determination.
ENVIRONMENTAL ADVISORY COUNCIL (EAC)RECOMMENDATION:
The EAC heard this petition on July 3, 2012, and voted 4-1 to approve with the following
stipulations.
1. The proposed project be designed to a depth required for navigation of a 3-foot draft
vessel, maximum.
2. Construction elements (dredging, sand placement, etc.) of the project will be undertaken
outside of sea turtle nesting season.
COLLIER COUNTY PLANNING COMMISSION (CCPC)RECOMMENDATION:
This item was heard by the CCPC at the August 16, 2012 hearing, and by a vote of 7-0
recommended to forward this petition to the Board of County Commissioners (BCC) with a
recommendation of approval, subject to staffs recommendations.
1. The dredge project be designed for boats with a three-foot maximum draft.
2. Construction activities be limited to outside of sea turtle nesting season.
LEGAL CONSIDERATIONS:
This item has been reviewed and approved for legal sufficiency. A majority vote of the Board is
necessary for Board action. HFAC
RECOMMENDATION:
Staff concurs with the recommendations of the EAC and CCPC and recommends that the BCC
approve the ST permit as specified in the attached resolution.
PREPARED BY: Stephen Lenberger, Senior Environmental Specialist, Natural Resources
Department of the Growth Management Division -Planning & Regulation
Attachments:
1) CCPC Staff Report
2) EAC Staff Report
3) Resolution (includes Exhibit A—Project Component Map; Exhibit B—Conditions of
Approval)
4) ST Overlays Exhibit
5) Application
OV 0 J
AGENDA ITEM 10-A `v
Co er County
STAFF REPORT
TO: COLLIER COUNTY PLANNING COMMISSION
FROM: NATURAL RESOURCES DEPARTMENT
PLANNING&ZONING DEPARTMENT
GROWTH MANAGEMENT DIVISION -PLANNING®ULATION
HEARING: AUGUST 16, 2012
SUBJECT: PETITION: ST-PL20120000168, WIGGINS PASS MAINTENANCE
DREDGING AND NAVIGATION IMPROVEMENT PROJECT SPECIAL
TREATMENT PERMIT
PROPERTY OWNER/AGENTS:
Applicant:
Collier County Board of County Commissioners
Collier County Coastal Zone Management Department
3299 Tamiami Trail East, Suite 103
Naples,FL 34112
Property Owner:
Trustees of the Internal Improvement Trust Fund (TIITF)of Florida
Division of State Lands
Bureau of Public Land Administration
3800 Commonwealth Blvd.
Tallahassee, Florida 32399
Leased by:
Collier County Board of County Commissioners
3299 Tamiami Trail East, Suite 303
Naples, FL 34112
REQUESTED ACTION:
The Applicant requests a Special Treatment (ST) permit for dredging to improve navigation and
address erosion issues at Wiggins Pass.
GEOGRAPHIC LOCATION:
Page 1 of 11
o� /
•
Wiggins Pass is located at the Gulf of Mexico between Delnor-Wiggins State Recreation Area and
Barefoot Beach State Preserve, in Sections 17 & 20, Township 48 South, Range 25 East, Collier
County, Florida. In addition, the Pass is located 5 miles north of Clam Pass and 5.9 miles south of
Big Hickory Pass, and is a natural inlet which provides access to the Gulf of Mexico for a number
of embayments and rivers along three main interior channels. The eastern channel connects to the
Cocohatchee River. The southern channel connects to Water Turkey Bay and Vanderbilt Lagoon,
and the northern channel connects to the lagoon between Little Hickory Island and the mainland.
Wiggins Pass is bounded by public lands which extend 7,950 linear feet to the north and 6,010
linear feet to the south. Barefoot Beach Preserve lies to the north and Delnor-Wiggins Pass State
Park is to the south.
PURPOSE/DESCRIPTION OF PROJECT:
The Wiggins Pass Maintenance Dredging and Navigation Improvement Project is a non-structural
solution designed to improve navigation and to address the erosion issue at Barefoot Beach. This
project will not involve removal of any native vegetation or wetlands, and avoidance measures
will be incorporated during dredging to avoid impacts to seagrass resources. The proposed project
will re-establish a historic location of the flood channel: the new flood channel will be relocated to
where the flood channel was located in the last 60-80 years. Overall, the proposed project consists
of an initial dredging, major maintenance dredging every 4 years, and minor maintenance
dredging in between, for a total volume of approximately 214,000 cubic yards over a ten-year
period. The existing 1995 Wiggins Pass Inlet Management Plan requires dredging at least 50,000
cubic yards every 2 years, for a total cumulative volume of at least 300,000 cubic yards every
decade. The proposed plan will require approximately 86,000 cubic yards less material to be
dredged over a ten-year period.
SURROUNDING LAND USE AND ZONING:
NORTH- Barefoot Beach State Preserve (CON-ST)
SOUTH- Delnor-Wiggins Pass State Park(CON-ST)
EAST - Tidal waters and wetlands/Cocohatchee River(A-ST)
WEST— Gulf of Mexico
GROWTH MANAGEMENT PLAN (GMP) CONSISTENCY:
A. Future Land Use Element
The proposed dredging area is located within the Conservation designated area on the
countywide Future Land Use map, and within the Coastal High Hazard Area.
The Future Land Use Element does not specifically address dredging. However, the
proposed dredging is intended to restore and stabilize eroded shorelines, protect native
vegetation and wildlife, improve inlet navigation, improve estuary flushing, improve water
quality, and enhance recreational opportunities. These functions are generally promoted
and supported in certain Goals, Objectives and Policies of the Future Land Use Element
(and Recreation and Open Space Element and Conservation and Coastal Management
Page 2 of 11
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Element) of the Growth Management Plan and allowed by the Conservation designation.
Therefore, the Comprehensive Planning staff is of the opinion that the proposed project
does not conflict with the Goals, Objectives and Policies of the Future Land Use Element.
B. Conservation& Coastal Management Element
Staff finds the project to be consistent with the relevant Objectives and Policies of the
CCME. A Collier County Special Treatment (ST) Permit and Coastal Construction
Setback Line Permit will be required prior to the start of construction, for consistency with
the County Land Development Code.
The project is consistent with Policy 1.3.1 of the CCME which outlines the purpose for
Natural Resource Protection Areas. These designated areas are meant to protect, maintain
and restore ecological functions, which this project is designed to do.
Policy 6.1.8 of the CCME requires appropriate environmental data to be submitted for
proposed development, site alteration or projects,to protect, conserve and enhance
environmental quality and resources. Appropriate environmental data has been submitted
for review of the Special Treatment Permit.
Policy 7.2.1 of the CCME requires the County to apply the marina siting criteria contained
in the Collier County Manatee Protection Plan in order to direct increased boat traffic away
from sensitive manatee habitats. The marina siting criteria contained in the Manatee
Protection Plan is applicable to all multi-slip docking facilities with ten slips or more and
all marina facilities. Since the proposed project is not in conjunction with a marina or
multi-slip docking facility,the Manatee Protection Plan does not apply.
Goal 10 of the CCME restricts construction of all structures seaward of the Coastal
Construction Control Line (CCCL), as established by the Florida Coastal Zone Protection
Act of 1985. The CCCL included in the Collier County Growth Management Plan is that
which was established in 1974; is referred to as the Coastal Construction Setback Line
(CCSL) by Collier County. Staff's review of the subject property found the project as
proposed to be seaward of the CCSL. A Coastal Construction Setback Line Permit will be
required prior to dredging, for consistency with the Land Development Code.
Objective 10.3 of the CCME, states that"Undeveloped coastal barriers shall be maintained
predominantly in their natural state and their natural function shall be protected,
maintained and enhanced."
Objective 10.5 and its associated Policies encourage opportunities for recreational,
educational, scientific and esthetic enjoyment of coastal resources, and also require that
construction activities not interfere with sea turtle nesting, maintain the natural beach
profile and minimize interference with the natural beach dynamics and function.
Consistence with Objectives 10.3, 10.5 and their associated Policies, the project provides a
non-structural alternative to improve inlet navigation, restore and stabilize adjacent eroded
Page 3 of 11
shorelines, protect native vegetation and wildlife, improve flushing of the estuary, and
encourage recreation opportunities for enjoyment of the coastal resources.
ANALYSIS:
1. Project History, Goals and Analysis
Wiggins Pass is currently dredged at regular intervals of approximately 2 years to maintain
navigation for boats with up to a 3 foot draft. The pass provides boat access to the Gulf from
inland waterways and lagoons at Vanderbilt Beach, the Cocohatchee River, Wiggins Pass Marina,
and several other private and public marinas and ramps. The dredged channel extends from the
inlet throat to about 1,200 feet offshore. Periodic dredging has occurred at the intersection of the
interior channels. Disposal areas are located north of the inlet between R11.4 to R14.2 (FDEP R-
Monument Markers) and south of the inlet between R18 and R20.5. The inlet has been dredged
since 1984 under two previous permits. Details of the history of Wiggins Pass, management of the
inlet and analysis thereof are provided in the engineering study, in Appendix 3 of the
Environmental Data for the project.
The goals for the Wiggins Pass navigation improvement study as developed by Collier County and
the Wiggins Pass Modeling Evaluation Committee are:
1. To provide a safe channel for boating
2. To address erosion at Barefoot Beach
3. To lengthen the dredge cycle, accomplished with the least impact on the environment
4. To provide a solution that is economically effective
A non-structural alternative is an objective for the inlet design in order to improve navigation.
The committee, which formulated the main goals for Wiggins Pass, represented a broad range of
local stake holders appointed by Collier County.
The current and historic inlet and shoreline conditions were evaluated in order to develop an
improved inlet management strategy. A complete coastal study was performed in conjunction with
the Florida Department of Environmental Protection (FDEP) Joint Coastal Permit (JCP) process.
This study included an engineering report and two modeling reports. The 2012 engineering report
contains a refined modeling report that was based upon the initial 2009 modeling study. The 2009
report also contains minutes and details from the special committee of the Coastal Advisory
Committee (CAC).
The project recommended in the 2009 modeling study and refined based on comments generated
by the 2010 permit application is summarized below. Refinements were developed during the last
year based on new field investigations and further consultation with agencies. The plan addresses
concerns expressed by FDEP Bureau of Beaches and Coastal Systems (BBCS) and Park Service,
and other local interest groups. It addresses not only navigation, but also improved sand
bypassing, modifications to channel dredging, improved locations for sand disposal, and an
updated inlet management study. It accomplishes improved navigation and sediment management
Page 4 of 11
4(t,
by a combination of straightening the channel, major and small maintenance dredging, and new
sand disposal practices.
The proposed design modifies and improves upon the County-approved 1995 Wiggins Pass Inlet
Management Plan. This project includes channel realignment which will be accomplished by
straightening the inlet channel layout and mulling and blocking the northern flood shoal meander.
The east, north, and south interior channel entrances are identified for maintenance dredging,
should sand shoal within their respective boundaries. The designated dredge disposal locations and
distribution will be modified and relocated based on shoreline monitoring results, with preference
given to areas with greatest need. Incorporating the ability to modify disposal locations will
increase management flexibility, reduce sediment loss to the system, and minimize impacts to
Barefoot Beach and Delnor-Wiggins Pass State Park shoreline. Nearshore and beach (onshore)
disposal areas are located north of the inlet between R-12 to R-15.5 and south of the inlet between
R-18 and R-20. As Barefoot Beach recovers towards its traditional shoreline location, its disposal
area will need to move west in order to account for the increased shoreline width. An ebb shoal
disposal area has also been designated to assist in stabilizing the Barefoot Beach shoreline. A
separate offshore disposal area (Borrow Area 6 from the 1996 Beach Nourishment Project) has
been designated as an acceptable location to place unsuitable fill dredged from the channel. The
project also includes scarp repair along southern Barefoot Beach to restore the beach to historic
conditions. A dynamic design will be incorporated into the maintenance plan for the inlet so that
long-term dredging can be reduced. Impacts to natural resources will be avoided or minimized.
The beach-fill and scarp repair (upland disposal) element at Barefoot Beach is contingent based
upon clarification of land use and management plans. Beach fill can either be placed onshore or
nearshore at Delnor-Wiggins Pass State Park. Both have received preliminary support from
Florida Department of Environmental Protection (FDEP). All areas identified for dredging or
placement of fill, are owned by the State of Florida.
In order to minimize project dredging, some natural migration of the channel will be allowed. The
ebb channel will be allowed to migrate up to 50 feet north-and south, except at the gap in the hard
substrate. The flood channel will be allowed to migrate up to 50 feet north. Dredging centered on
the current channel location,to the maximum extent practical,will reduce dredging volumes.
Intermediate ebb channel dredging (small scale dredging) may be needed to clear the channel at
the bar (sand bypassing bar). Material from the small scale dredgings would be placed to an area
approximately 300-1000 feet north of the inlet (ebb shoal disposal area). Two of the main
purposes for placement of this fill in the ebb shoal disposal area are to feed the re-growth of the
ebb shoal and to allow for clearing of the ebb channel.
Page 5 of 11
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rk.M. 4 t t --4.• ."4,Y,— c.
4 FO9T B S.H L 3,,* 4 !
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„„„„„„„11„i„,„ .....Pik,v A\\\\\\\\\\\\\\\\\\\\n 1
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1.-,.,,,,,.. "`..„►.._ EBB SHOAL DREDGE ARK a:"..41.,r �.
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z "``'
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VEGETATION)
' Figure 1: Project Component Map
Each of the tasks described above supports improved navigation and inlet management. The
engineering report has identified the reasons why the 1995 inlet plan did not perform well. The
sediment transport direction is not predominately southerly. The disposal location and a 50:50
split of bypassed sand to adjacent beaches was imbalanced. The sand needs to be disposed of
closer to the inlet and approximately two-thirds needs to go to the north. This imbalanced disposal
since 1984 needs short term supplemental sand to address past practices. The new plan addresses
the imbalance, recovery of the north ebb shoal, the Barefoot Beach hot spot (area of high erosion)
south of R-14, and improving navigation. The solution addresses the importance of both natural
and manmade forces underappreciated in previous studies and incorporates the controlling
geology into the plan. Insufficient sand bypassing to the north and the natural migration of the
flood channel to the north are the two major causes of the current problems, which are addressed
by the design.
Inlets in other communities have also been relocated in order to alleviate erosion and illustrate the
benefits of using non-structural options to address inlet channel migration related problems.
Examples of these projects are included in Section V (Navigation and Public Safety section) of the
engineering study, in the Environmental Data.
2. Project Permitting
Collier County submitted a Joint Coastal Permit (JCP) application to FDEP and U.S. Army Corps
Page 6 of 11
of Engineers (USACE) on February 17, 2010. A copy of this complete JCP application and all
supporting attachments is provided as Appendix 1, on the CD provided in the Environmental Data.
The FDEP and USACE issued RAI's on March 24, 2010 and March 19, 2010, respectively. These
RAI's and their corresponding responses are provided as Appendix 2; only relevant environmental
attachments are provided as hard copies, but all attachments are included on the CD. At the
request of FDEP Bureau of Beaches and Coastal Systems (BBCS) staff, Coastal Planning &
Engineering, Inc. (CPE) prepared the engineering study, which was submitted to FDEP with the
RAI No. 1 Response.
Collier County has also applied for a Special Treatment (ST)permit; the application of which has
been included as Appendix 4 of the Environmental Data. The County will also apply for a Coastal
Construction Setback Line (CCSL) permit and a Vehicle on the Beach (VOB) permit, at the time
of construction.
3. Native Habitats
Natural resources of the project area are comprised of three major resource classifications: the
beach/dune/coastal strand system; estuarine resources; and near-shore Gulf of Mexico. The marine
and estuarine environments surrounding Wiggins Pass are directly influenced by the pass, which
allows for the mixing of Gulf and estuarine waters. Temperature and salinity regimes are
predominantly controlled by the tide. The pass provides access for a variety of estuarine-marine
migratory species, including snook and mullet. The descriptions of the natural resources are based
on available references and on-site investigations, and can be found in the Environmental Data and
Environmental Advisory Council (EAC) staff report for the project. Detailed descriptions of the
habitats found north and south of Wiggins Pass can be found in the Barefoot Beach Land
Management Plan (Appendix 5 (pp. 5-11; Appendix E; Appendix I)) and Delnor-Wiggins Pass
State Park Unit Management Plan (Appendix 6 (pp. 9-20)). Figure 4 shows the location of natural
resources in the vicinity of Wiggins Pass.
Page 7 of 11
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•••PROPOSED DISPOSAL AREA ,•••. r�
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•2011 PRELIMINARY ALIGNMENT _ •1„/".
.1✓y • 1 .j
2000-2011 PERMITTED DREDGE TEMPLATE ""' ,R;',1.7 ; f COLLIER '
—SEPTEMBER 9,2010 HARDBOTTOM OBSERVATION x COUNTY
•r AUGUST 2009 SSS HARDBOTTOM EDGE b
1994 SSS POTENTIAL HARDBOTTOM �..� R 18 i
0 2009 OYSTER BEDS gr
� �'- .' DELNO
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8 2009 SEAGRASS(HALODULE WRIGHTlQ ∎ PARK ,.
• 2009 SEAGRASS(HALOPH!LA DECIPIENS) 'R
2008 SURVEYED SEAGRASS " a i �. Y.
e REPORTED ROCK SUBSTRATE(CEC 1990,CPE 1995) -*41---'-'----•" # s ` �.
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• VERY ACTIVE t , = _-
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y ' ,. r• P
• OTHER(82-302.700(9)(c)and(f),F.A.C.)
❑SPECIAL(62-302.700(9)0),F.A.C.) ? { r `
NOTES;
1.AERIAL PHOTOGRAPHY PROVIDED BY COLLIER COUNTY,DATE FLOWN 2009.
2.ENVIRONMENTAL FIELD INVESTIGATIONS PERFORMED BY CPE ON DECEMBER 10,2008 JULY 13&14,2009
AND SEPTEMBER 29,2011.
3.LOCATION OF ROCK LEDGE TAKEN FROM 1995 INLET MANAGMENT PLAN(CPE 1995),BUT WAS ORIGINALLY IDENTIFIED
BY CEC IN 1990.
Figure 4: Natural resources in the vicinity of Wiggins Pass
4. Listed Species
A list of threatened and endangered species and species of special concern with the potential to
occur in the project area is presented in Table 2 (Townsend and Olson, 2007; FDEP, 2009) in the
Page 8 of 11
C
VA
Environmental Data. Listed species documented from the project area are also presented in the
Environmental Data and in the EAC staff report. Complete lists of wildlife and plants which have
been observed north and south of Wiggins Pass can be found in the Barefoot Beach Land
Management Plan (Appendix 5 (species list pp. 5-10; listed species pp. 10-11; natural resource
inventory Appendix E; Appendix I)) and Delnor-Wiggins Pass State Park Unit Management Plan
(Appendix 6 (imperiled species pp. 16-19; complete species lists Addendum 4)).
5. Conservation Measures
Construction will comply with all permit requirements that will result from coordination with
Florida Department of Environmental Protection (FDEP), Florida Fish and Wildlife Conservation
Commission (FWC), U.S. Army Corps of Engineers (USACE), U.S. Fish and Wildlife Service
(USFWS), and National Marine Fisheries Service (NMFS). Construction activities will be kept
under surveillance, management, and control to minimize interference with, disturbance of, or
damage to wildlife resources, particularly threatened and endangered species, within the project
area. This project will also adhere to LDC section 3.04.02, which contains protection measures for
listed species.
Sea Turtles and Smalltooth Sawfish
Construction will adhere to the NMFS "Sea Turtle and Smalltooth Sawfish Construction
Conditions" during construction of this project. Construction will be limited to outside of sea turtle
nesting season.
Gopher Tortoises
Project construction will be in accordance with LDC subsection 3.04.02.A.
Manatees
Construction operations will comply with FWC's "2011 Standard Manatee Conditions for In-
Water Work"during construction of this project.
Birds
Shorebirds may be disturbed by construction activities and find quieter areas of the beach to roost.
Shorebird monitoring in and near the project area will be conducted as required by the FWC.
Seagrass and Oyster Beds
Whenever feasible, turbidity curtains will be utilized to protect seagrass and oyster beds in the
work area from turbidity and sedimentation during construction.
Hardbottom Resources
Hardbottom monitoring will be conducted as required by FDEP.
ZONING ANALYSIS:
The Rural Agricultural (A) district permits "conservation uses" and the Conservation (CON)
district permits "habitat preservation and conservation uses"; therefore, the project is consistent
with the LDC.
Page 9 of 11
\C6\\V
ENVIRONMENTAL ADVISORY COUNCIL (EAC)RECOMMENDATION:
The EAC heard this petition on July 3, 2012 and recommended by a vote of 4/1 to approve
petition ST-PL20120000168, Wiggins Pass Maintenance Dredging and Navigation Improvement
Project Special Treatment Permit, subject to the following stipulations.
1. The proposed project, be designed to a depth required for navigation of a 3 foot draft
vessel,maximum.
2. Construction elements (dredging, sand placement, etc.), of the project be undertaken
outside of sea turtle nesting season.
Reasons cited for the dissenting vote were lack of study of the infauna in the area to be dredged
and of the effects the project will have on the infauna,and that the channel is a dynamic shifting
system which the project will not stop but only slow down.
COUNTY ATTORNEY OFFICE REVIEW:
The County Attorney's Office has reviewed the staff report for this petition.
STAFF RECOMMENDATION:
Staff recommends approval of petition ST-PL20120000168, Wiggins Pass Maintenance Dredging
and Navigation Improvement Project Special Treatment Permit, subject to the following
conditions.
1. The dredge project be designed for boats with a three-foot maximum draft.
2. Construction activities be limited to outside of sea turtle nesting season.
Attachments:
Attachment 1: Wiggins Pass Dredging and Navigation Improvement Project Environmental Data
Attachment 2: EAC Staff Report
Attachment 3: Resolution
Page 10of11
1
OU \
PREPARED BY:
/ /lam 7%Q/)o
STEPHEN LENBERGER DATE
SENIOR ENVIRONMENTAL SPECIALIST
SURFACE WATER&ENVIRONMENTAL PLANNING SECTION
NATURAL RESOURCES DEPARTMENT
1II c 7- 3/ - /
FRE[. t.- SCHL, AICP, SENIOR PLANNER DATE
PLANNING&ZONING DEPARTMENT
REVIEWED BY:
-
RAYNTD V. BELLOWS,ZONING MANAGER DATE
PLANKING&ZONING DEPARTMENT
S- 3- )z
MIKE BOSI, AICP, INTERIM DIRECTOR DATE
PLANNING& ZONING DEPARTMENT
.91aLeX 7/ c)
JERRY KURTZ,P.E., M GER DATE
SURFACE WATER&ENVIRONMENTAL PLANNING SECTION
NATURAL RESOURCES DEPARTMENT
P ,• OB.
/" LLIAM D. 'YORE , JR.,P.E., DIRECTOR DATE
NATURAL RESOURCES DEPARTMENT
APP : I VED BY:
/Ae / -
N K CASALA i . ;A, ter- IST R DATE
GROWTH MA AGEME IT DIVISION
Page 11 of 11
c)k \\CV
\C)
Item VI.A
ENVIRONMENTAL ADVISORY COUNCIL
STAFF REPORT
MEETING OF JULY 3,2012
I. NAME OF PETITIONER/PROJECT
Petition No.: ST-PL20120000168
Petition Name:
Wiggins Pass Maintenance Dredging and Navigation Improvement Project
Applicant/Developer: Collier County Coastal Zone Management Department
Engineering/Environmental Consultant: Coastal Planning&Engineering, Inc.
II. LOCATION
Wiggins Pass is located at the Gulf of Mexico between Delnor-Wiggins State
Recreation Area and Barefoot Beach State Preserve, in Sections 17 & 20,
Township 48 South, Range 25 East, Collier County, Florida. In addition, the Pass
is located 5 miles north of Clam Pass and 5.9 miles south of Big Hickory Pass,
and is a natural inlet which provides access to the Gulf of Mexico for a number of
embayments and rivers along three main interior channels. The eastern channel
connects to the Cocohatchee River. The southern channel connects to Water
Turkey Bay and Vanderbilt Lagoon, and the northern channel connects to the
lagoon between Little Hickory Island and the mainland. This northern lagoon
consists of a number of embayments including May Flower, Palm Vines, Little
Hickory Bays, and eventually connects to Big Hickory Pass. There is no interior
waterway connection south to Clam Pass. Wiggins Pass is bounded by public
lands which extend 7,950 linear feet to the north and 6,010 linear feet to the south.
Barefoot Beach Preserve lies to the north and Delnor-Wiggins Pass State Park is
to the south.
HI. DESCRIPTION OF SURROUNDING PROPERTIES
ZONING DESCRIPTION
N- CON-ST Barefoot Beach
State Preserve
S - CON-ST Delnor-Wiggins
State Recreation Area
EAC Meeting
d �
Page 2 of 15
E - A-ST Tidal Waters/Wetlands
Cocohatchee River
W- N/A Gulf of Mexico
IV. PROJECT DESCRIPTION
The Wiggins Pass Maintenance Dredging and Navigation Improvement Project is
a non-structural solution designed to improve navigation and to address the
critical erosion issue at Barefoot Beach. This project will not involve removal of
any native vegetation or wetlands, and avoidance measures will be incorporated
during dredging to avoid impacts to seagrass resources. The proposed project will
re-establish a historic location of the flood channel: the new flood channel will be
relocated to the where the flood channel was located in the last 60-80 years.
Overall, the proposed project consists of an initial dredging, major maintenance
dredging every 4 years, and minor maintenance dredging in between, for a total
volume of approximately 214,000 cubic yards over a ten-year period. The existing
project requires dredging at least 50,000 cubic yards every 2 years, for a total
cumulative volume of at least 300,000 cubic yards every decade. The proposed
dredging plan will require approximately 86,000 cubic yards less material to be
dredged over a ten-year period, over the existing plan.
V. GROWTH MANAGEMENT PLAN CONSISTENCY
A. Future Land Use Element
The proposed dredging area is located within the Conservation designated area on
the countywide Future Land Use map, and within the Coastal High Hazard Area.
The Future Land Use Element does not specifically address dredging. However,
the proposed dredging is intended to restore and stabilize eroded shorelines,
protect native vegetation and wildlife, improve inlet navigation, improve estuary
flushing, improve water quality, and enhance recreational opportunities. These
functions are generally promoted and supported in certain Goals, Objectives and
Policies of the Future Land Use Element (and Recreation and Open Space
Element and Conservation and Coastal Management Element) of the Growth
Management Plan and allowed by the Conservation designation. Therefore, the
Comprehensive Planning staff is of the opinion that the proposed project does not
conflict with the Goals, Objectives and Policies of the Future Land Use Element.
B. Conservation& Coastal Management Element
Staff finds the project to be consistent with the relevant Objectives and Policies of
the CCME. A Collier County Special Treatment (ST) Permit and Coastal
EAC Meeting \4;�rb
Page 3 of 15
Construction Setback Line Permit will be required prior to the start of
construction, for consistency with the County Land Development Code.
The project is consistent with Policy 1.3.1 of the CCME which outlines the
purpose for Natural Resource Protection Areas. These designated areas are meant
to protect, maintain and restore ecological functions, which this project is
designed to do.
Policy 6.1.8 of the CCME requires appropriate environmental data to be
submitted for proposed development,site alteration or projects,to protect,
conserve and enhance environmental quality and resources. Appropriate
environmental data has been submitted for review of the Special Treatment
Permit.
Policy 7.2.1 of the CCME requires the County to apply the marina siting criteria
contained in the Collier County Manatee Protection Plan in order to direct
increased boat traffic away from sensitive manatee habitats. The marina siting
criteria contained in the Manatee Protection Plan is applicable to all multi-slip
docking facilities with ten slips or more and all marina facilities. Since the
proposed project is not in conjunction with a marina or multi-slip docking facility,
the Manatee Protection Plan does not apply.
Goal 10 of the CCME restricts construction of all structures seaward of the
Coastal Construction Control Line (CCCL), as established by the Florida Coastal
Zone Protection Act of 1985. The CCCL included in the Collier County Growth
Management Plan is that which was established in 1974; is referred to as the
Coastal Construction Setback Line (CCSL) by Collier County. Staffs review of
the subject property found the project as proposed to be seaward of the CCSL. A
Coastal Construction Setback Line Permit will be required prior to dredging, for
consistency with the Land Development Code.
Objective 10.3 of the CCME, states that "Undeveloped coastal barriers shall be
maintained predominantly in their natural state and their natural function shall be
protected,maintained and enhanced."
Objective 10.5 and its associated Policies encourage opportunities for
recreational, educational, scientific and esthetic enjoyment of coastal resources,
and also require that construction activities not interfere with sea turtle nesting,
maintain the natural beach profile and minimize interference with the natural
beach dynamics and function.
Consistence with Objectives 10.3, 10.5 and their associated Policies, the project
provides a non-structural alternative to improve inlet navigation, restore and
stabilize adjacent eroded shorelines, protect native vegetation and wildlife,
EAC Meeting ()\'A(2
Page 4 of 15
improve flushing of the estuary, and encourage recreation opportunities for
enjoyment of the coastal resources.
VI. MAJOR ISSUES
A. Stormwater Management N/A
B. Environmental
(Information obtained from the environmental data submitted for the project)
1. Project History, Goals and Analysis
Wiggins Pass is currently dredged at regular intervals of approximately 2 years to
maintain navigation for boats with up to a 3 foot draft. The pass provides boat
access to the Gulf from inland waterways and lagoons at Vanderbilt Beach, the
Cocohatchee River, Wiggins Pass Marina, and several other private and public
marinas and ramps. The dredged channel extends from the inlet throat to about
1,200 feet offshore. Periodic dredging has occurred at the intersection of the
interior channels. Disposal areas are located north of the inlet between R11.4 to
R14.2 (FDEP R-Monument Markers) and south of the inlet between R18 and
R20.5. The inlet has been dredged since 1984 under two previous permits. Details
of the history of Wiggins Pass, management of the inlet and analysis thereof are
provided in the engineering study,in Appendix 3 of the Environmental Data.
The goals for the Wiggins Pass navigation improvement study as developed by
Collier County and the Wiggins Pass Modeling Evaluation Committee are:
1. To provide a safe channel for boating
2. To address erosion at Barefoot Beach
3. To lengthen the dredge cycle, accomplished with the least impact on the
environment
4. To provide a solution that is economically effective
A non-structural alternative is an objective for the inlet design in order to improve
navigation. The committee, which formulated the main goals for Wiggins Pass,
represented a broad range of local stake holders appointed by Collier County.
The current and historic inlet and shoreline conditions were evaluated in order to
develop an improved inlet management strategy. A complete coastal study was
performed in conjunction with the Florida Department of Environmental
Protection (FDEP) Joint Coastal Permit (JCP) process. This study included an
engineering report and two modeling reports. The 2012 engineering report
contains a refined modeling report that was based upon the initial 2009 modeling
study. The 2009 report also contains minutes and details from the special
committee of the Coastal Advisory Committee(CAC).
N/
J \n J
EAC Meeting 1C\1 l/
Page 5 of 15
The project recommended in the 2009 modeling study and refined based on
comments generated by the 2010 permit application is summarized below.
Refinements were developed during the last year based on new field
investigations and further consultation with agencies. The plan addresses
concerns expressed by FDEP Bureau of Beaches and Coastal Systems (BBCS)
and Park Service, and other local interest groups. It addresses not only navigation,
but also improved sand bypassing, modifications to channel dredging, improved
locations for sand disposal, and an updated inlet management study. It
accomplishes improved navigation and sediment management by a combination
of straightening the channel, major and small maintenance dredging, and new
sand disposal practices.
The proposed design modifies and improves upon the County-approved 1995
Wiggins Pass Inlet Management Plan. This project includes channel realignment
which will be accomplished by straightening the inlet channel layout and infilling
and blocking the northern flood shoal meander. The east, north, and south interior
channel entrances are identified for maintenance dredging, should sand shoal
within their respective boundaries. The designated dredge disposal locations and
distribution will be modified and relocated based on shoreline monitoring results,
with preference given to areas with greatest need. Incorporating the ability to
modify disposal locations will increase management flexibility, reduce sediment
loss to the system, and minimize impacts to Barefoot Beach and Delnor-Wiggins
Pass State Park shoreline. Nearshore and beach (onshore) disposal areas are
located north of the inlet between R-12 to R-15.5 and south of the inlet between
R-18 and R-20. As Barefoot Beach recovers towards its traditional shoreline
location, its disposal area will need to move west in order to account for the
increased shoreline width. An ebb shoal disposal area has also been designated to
assist in stabilizing the Barefoot Beach shoreline. A separate offshore disposal
area (Borrow Area 6 from the 1996 Beach Nourishment Project) has been
designated as an acceptable location to place unsuitable fill dredged from the
channel. The project also includes scarp repair along southern Barefoot Beach to
restore the beach to historic conditions. A dynamic design will be incorporated
into the maintenance plan for the inlet so that long-term dredging can be reduced.
Impacts to natural resources will be avoided or minimized.
•
EAC Meeting k°\Ch lC
Page 6 of 15
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fiu*RT ,0c.i.
a E 4
i-r-.4d1 s^t s. •? y �1i J 1
s.° SS....Zr._ * ,Ii.,�4a,.an 't irs 4, •'� j ■ 1 ci 7s-y hA ,Y ;
SCARP REPAIR S I DREDGE ,- A \�ti E ,�A_
PRIMARY(NORTH) I AREA r�.i+'-+ ''l,
NEAR$HORE AND BEACH ° '-', -;
DISPOSAL AREA li 1'SECONDARY(SOUTH, y' r �,
NEARSHORE AND BEA o-`
-r EBB SHOAL. Ii I DISPOSAL AREA n `"
4y`"`-.:,,,,, DISPOSAL AREA -
2$
MOTS:ON4MORf O6POLL6 FUTURE N{AN
Figure 1: Project Component Map
The beach-fill and scarp repair (upland disposal) element at Barefoot Beach is
contingent based upon clarification of land use and management plans. Beach fill
can either be placed onshore or nearshore at Delnor-Wiggins Pass State Park.
Both have received preliminary support from Florida Department of
Environmental Protection(FDEP).
In order to minimize project dredging, some natural migration of the channel will
be allowed. The ebb channel will be allowed to migrate up to 50 feet north and
south, except at the gap in the hard substrate. The flood channel will be allowed to
migrate up to 50 feet north. Dredging centered on the current channel location, to
the maximum extent practical, will reduce dredging volumes.
Intermediate ebb channel dredging (small scale dredging) may be needed to clear
the channel at the bar (sand bypassing bar). Material from the small scale
dredgings would be placed to an area approximately 300-1000 feet north of the
/
EAC Meeting °110\CID t!
Page 7 of 15
inlet (ebb shoal disposal area). Two of the main purposes for placement of this fill
in the ebb shoal disposal area are to feed the re-growth of the ebb shoal and to
allow for clearing of the ebb channel. If dredging could be conducted using
smaller equipment during the calmer times of the year, it would also be very
economical.
Each of the tasks described above supports improved navigation and inlet
management. The engineering report has identified the reasons why the 1995
inlet plan did not perform well. The sediment transport direction is not
predominately southerly. The disposal location and a 50:50 split of bypassed sand
to adjacent beaches was imbalanced. The sand needs to be disposed of closer to
the inlet and approximately two-thirds needs to go to the north. This imbalanced
disposal since 1984 needs short term supplemental sand to address past practices.
The new plan addresses the imbalance, recovery of the north ebb shoal, the
Barefoot Beach hot spot (area of high erosion) south of R-14, and improving
navigation. The solution addresses the importance of both natural and manmade
forces underappreciated in previous studies and incorporates the controlling
geology into the plan. Insufficient sand bypassing to the north and the natural
migration of the flood channel to the north are the two major causes of the current
problems,which are addressed by the design.
Inlets in other communities have also been relocated in order to alleviate erosion
and illustrate the benefits of using non-structural options to address inlet channel
migration related problems. Examples of these projects are included in Section V,
the Navigation and Public Safety section of the engineering study.
2. Project Permitting
Collier County submitted a Joint Coastal Permit (JCP) application to FDEP and
U.S. Army Corps of Engineers (USACE) on February 17, 2010. A copy of this
complete JCP application and all supporting attachments is provided as Appendix
1, on the CD provided in the Environmental Data for the project. The FDEP and
USACE issued RAI's on March 24, 2010 and March 19, 2010, respectively.
These RAI's and their corresponding responses are provided as Appendix 2; only
relevant environmental attachments are provided as hard copies, but all
attachments are included on the CD. At the request of FDEP Bureau of Beaches
and Coastal Systems (BBCS) staff, Coastal Planning & Engineering, Inc. (CPE)
prepared the engineering study, which was submitted to FDEP with the RAI No. 1
Response.
Collier County has also applied for a Special Treatment (ST) permit; the
application of which has been included as Appendix 4. The County will also
apply for a Coastal Construction Setback Line (CCSL) permit and a Vehicle on
the Beach(VOB)permit, at the time of construction.
E
j\%
AC Meeting (1/
•
Page 8 of 15
3. Native Habitats
Natural resources of the project area are comprised of three major resource
classifications: the beach/dune/coastal strand system; estuarine resources; and
near-shore Gulf of Mexico. The marine and estuarine environments surrounding
Wiggins Pass are directly influenced by the pass, which allows for the mixing of
Gulf and estuarine waters. Temperature and salinity regimes are predominantly
controlled by the tide. The pass provides access for a variety of estuarine-marine
migratory species, including snook and mullet. The following descriptions of the
natural resources are based on available references and on-site investigations.
Detailed descriptions of the habitats found north and south of Wiggins Pass can
be found in the Barefoot Beach Land Management Plan (Appendix 5 (pp. 5-11;
Appendix E; Appendix I))and Delnor-Wiggins Pass State Park Unit Management
Plan (Appendix 6 (pp. 9-20)). Figure 4 shows the location of natural resources in
the vicinity of Wiggins Pass.
Estuarine wetlands within the Wiggins Pass project area include the tidal wetlands
and submerged habitats within and adjacent to the pass. East of the pass, several
fmger canals and a connecting channel have been dredged for boat access from
adjacent marinas and developed areas. With the exception of periodic dredging
through the navigational channels, the remaining tidal and submerged wetlands
within the project area are primarily undeveloped and retain their natural
characteristics. These shallow estuarine waters and the adjacent tidal areas
support productive mangrove forests and beds of seagrass, algae, and oyster.
These tidal and submerged wetlands serve as important breeding, feeding and -
nursery grounds for numerous fish and invertebrates such as crabs and shrimp.
Birds, such as egrets, terns, and herons, forage on small invertebrates and fish
found in the tidal flats and within the pass. Common infauna, include ghost crabs,
mole crabs, coquina clams, and various polychaetes, amphipods and isopods. Like
many of the intertidal animals found in this zone, coquina clams and mole crabs
are preyed upon by shorebirds and fish, thus providing a vital trophic link within
this community. Additionally, the sandy shoal areas within the project area,
primarily along the north end of Delnor-Wiggins Pass State Park, are important to
horseshoe crabs (Limulus polyphemus), which spawn along the wet beaches of the
project area (Robert Steiger, pers. comm., 2011). The eggs of the horseshoe crab
are, in turn, an important food source for foraging red knots (Calidris canutus), a
species that winters in Florida. Due to overfishing, horseshoe crab populations
have declined over recent years; as a result, red knot numbers have also dropped
dramatically.
Pj\
. \ti
EAC Meeting 10\cb
Page 9 of 15
1 y k
{
p, 7a Y .C- Ci
`�
11 ,R .. l
eat i - s v
0 1,000 2,000 t.' �}€
���' Feet » t,
1 inch=2,000 feet _
ROT " 7 .�°
` 4> M-* x
� . P SERVE ,/L
4 o i .1
'
LEGEND: R-;6. -
•••PROPOSED DISPOSAL AREA � �'
2011 PRELIMINARY ALIGNMENT �••'•� •,,�/d ,
2000-2011 PERMITTED DREDGE TEMPLATE R vY' - `. COLLIER
—SEPTEMBER 9,2010 HARDBOTTOM OBSERVATION , COUNTY
••-AUGUST 2009 SSS HARDBOTTOM EDGE
1994 SSS POTENTIAL HARDBOTTOM R 18•
ti 2009 OYSTER BEDS ,
2009 EDGE OF MANGROVE '' a v WIGG N 4
''`�R-lq PASS
• 2011 SURVEYED SEAGRASS(HALODULE WRIGHT!!) # STATE
e 2009 SEAGRASS(HALODULE WRIGHTII) PARK =
• 2009 SEAGRASS(HALOPHILA DEC!PIENS) ,1
2008 SURVEYED SEAGRASS n '� }
111 REPORTED ROCK SUBSTRATE(CEC 1990,CPE 1995) " • Y`. a"ri
r
2009 GOPHER TORTOISE BURROW SURVEY I '
R11 Il
• VERY ACTIVE , `
ACTIVE t a
INACTIVE
• ABANDONED R I ��
°^
OUTSTANDING FLORIDA WATERS 4 . , ;aI
• OTHER(82-302.700(9)(c)and(f),F.A.C.)
❑SPECIAL(82-302.700(9)(I),F.A.C.) ., , 1 '..
NOTES;
1.AERIAL PHOTOGRAPHY PROVIDED BY COLLIER COUNTY,DATE FLOWN 2009.
2.ENVIRONMENTAL FIELD INVESTIGATIONS PERFORMED BY CPE ON DECEMBER 10,2008 JULY 13&14,2009
AND SEPTEMBER 29,2011.
3.LOCATION OF ROCK LEDGE TAKEN FROM 1995 INLET MANAGMENT PLAN(CPE 1995),BUT WAS ORIGINALLY IDENTIFIED
BY CEC IN 1990.
Figure 4: Natural resources in the vicinity of Wiggins Pass
Extensive mangrove forests, including red mangrove (Rhizophora mangle), black
mangrove (Avicennia germinans) and white mangrove (Laguncularia racemosa),
fringe the waterways, while small red mangrove islands dot the estuary. Red and
black mangroves dominate those areas which are frequently inundated by normal
tidal action while white mangroves and buttonwoods (Conocarpus erectus) are
1
9/( l�
EAC Meeting ()1\,e6
Page 10 of 15
usually found at slightly higher elevations where tidal inundation is less frequent.
These forests provide both habitat and foraging areas for various species of birds,
crabs and other invertebrates, and the subtidal mangrove roots serve as nursery
grounds for fish species such as snook (Centropomus undecimalis), mullet(Mugil
cephalus) and sea trout(Cynoscion nebulosus).
Several field investigations over the years conducted by Coastal Planning &
Engineering, Inc. (CPE) and others have revealed scattered seagrass beds
throughout the project area, found in sparse to moderate density. Three species
have been observed in the area, including Cuban shoal grass (Halodule wrightii),
turtle grass (Thalassia testudinum), and paddle grass (Halophila decipiens),
although shoal grass is overwhelmingly the most common species observed.
These beds are typically found along the shallow shelf lining the main
navigational channel, and within the shallow protected areas fringing the small
mangrove islands. No seagrass was observed within the main channel and all
known seagrasses are being avoided with the planned alignment. Copies of recent
seagrass surveys and an observation report summarizing a September 29, 2011,
site visit with Mark Sramek — NMFS Habitat Conservation Department, are
provided as Appendix 7 of the Environmental Data. Scattered clusters of oysters
(Crassostrea virginica) are also common along the fringing mangroves and
surrounding the mangrove islands deep within the inlet.
The nearshore Gulf of Mexico classification includes the littoral (intertidal) zone
and the sublittoral (offshore) zone. The littoral zone is inhabited by organisms
such as polychaete worms, crustaceans, and bivalves. Organisms common to the
sublittoral zone include annelid worms, crustaceans, echinoderms, pelecypod and
gastropod mollusks, and various species of crabs and shrimp. In addition, the
coastal waters contain a variety of commercial and sport fishes including snook
(Centropomus undecimalis), pompano (Trachinotus carolinus), spotted seatrout
(Cynoscion nebulosus), groupers (Epinephelus and Mycteroperca spp.), snappers
(Lutjanus spp.),redfish (Sciaenops ocellatus)and flounders.
The nearshore Gulf floor consists of a mosaic of carbonate sand, small areas of
low-relief exposed hardbottom, and thin layers of carbonate sand over
hardbottom. Low relief hardbottom habitat is located offshore of the project area,
ranging from 300 to 500 feet from shore. Adjacent to Delnor-Wiggins Pass State
Park, the hardbottom is as close as 150-200 feet from shore. In general, the sand-
silt substrate supports a low-diversity, low density soft bottom assemblage.
Organisms frequently associated with the soft bottom include pen shells (Atrina
rigida), tube worms (Chaetopterus variopedatus), fighting conch (Strombus
alatus) and various echinoderms (Lytechinus variegatus, Melilla
quinquiesperforata, Astropecten sp., and Luidia senegalensis). Coastal Planning
& Engineering, Inc. (CPE) has conducted detailed mapping of nearshore
hardbottom north and south of Wiggins Pass.
EAC Meeting N4/
Page 11 of 15
Hardbottom mapping has been conducted in the nearshore region of Wiggins
Pass. Exposed hardbottom is not known to be present within or near the channels
of Wiggins Pass. A rock substrate has been verified to be located under the sand
of the ebb shoal. The ledge shown in Figure 4 was the report location from the
1990's, but recent investigations show it extended across the ebb shoal. The ebb
channel is generally located between two massive hard substrates within the
intervening gap. The natural, existing, and proposed ebb channels are located in
this gap.
The most extensive reach of hardbottom is located south of Wiggins Pass,
extending south of FDEP monument R-18; the location of this hardbottom has
been verified by remote sensing and dives by CPE between 2003 and 2009.
Exposed hardbottom is located as close as 600 feet from the shoreline between R-
20 and R-21 and over 1,000 feet offshore at R-18. There are also potential
hardbottom resources located north of Wiggins Pass, between R-9.5 and R-11.
The closest potential hardbottom detected during a CPE 1994 side scan survey
was approximately 900 ft from R-11. These resources were ground-truthed by
Collier County divers in September 2010 (Appendix 8); divers found hardbottom
north of the R-11 transect, and no hardbottom south of the R-11.5 transect. South
from R-11.5,the bottom was predominately mud.
CPE has conducted multiple assessments of the biotic community found on the
hardbottom south of Wiggins Pass. Dominant epibiota include macroalgae and
sponges, with some octocorals and scleractinian corals. Common macroalgae
genera include Caulerpa, Botryolcladia, Gracilaria, Hypnea and Sargassum.
Bioeroding sponges are also common, including Pione lampa and Cliona celata.
Although soft corals can be locally abundant, diversity is low, with Leptogorgia
virgulata and L. hebes most commonly observed. Stony coral species include
Solenastrea hyades, S. bournoni, Siderastrea siderea, S. radians, Oculina
robusta, Cladocora arbuscula and Phyllangia americana(CPE, 2009).
4. Preservation Requirements N/A
5. Listed Species
A list of threatened and endangered species and species of special concern with
the potential to occur in the project area is presented in Table 2 (Townsend and
Olson, 2007; FDEP, 2009) in the Environmental Data. Complete lists of wildlife
and plants which have been observed north and south of Wiggins Pass can be
found in the Barefoot Beach Land Management Plan(Appendix 5 (species list pp.
5-10; listed species pp. 10-11; natural resource inventory Appendix E; Appendix
I)) and Delnor-Wiggins Pass State Park Unit Management Plan (Appendix 6
(imperiled species pp. 16-19; complete species lists Addendum 4)). The following
are listed species documented from the project area.
EAC Meeting °Iii./\,11V\ik
Page 12 of 15
f
According to the 2010 Collier County Sea Turtle Protection Plan Annual Report
(Kraus et al., 2010), staff documented 422 loggerhead sea turtle (Caretta caretta)
nests during the 2010 season, a moderate increase from 297 nests in 2009. Twenty
nests were documented on the 1.2 mile (1.9 km) beach along Delnor-Wiggins
Pass State Park, and 87 nests were documented on the 3.1-mile (5-km) Barefoot
Beach survey area. During the 2010 nesting season, 3.5% (14) of the documented
nests were disoriented. Seven percent (31) of the nests were depredated, which is
an increase from four percent last year. A total of 27,142 hatchlings were
estimated to have reached the Gulf of Mexico. The number of successfully
emerged hatchlings represents an increase compared to 19,869 hatchlings that
reached the Gulf of Mexico in 2009. The number of strandings in Collier County
was 47 in 2010. This was a slight increase from 40 in 2009. Data from Collier
County Sea Turtle Protection Plan Annual Reports, 2005-2010, are presented in
Tables 3 and 4 (below). Table 3 presents sea turtle nesting data from Barefoot
Beach (R-1 to R-16) and Delnor-Wiggins Pass State Park(R-17 to R-22) between
2005 and 2010; all nests were laid by loggerheads.Nesting data for the immediate
project vicinity around Wiggins Pass (the south end of Barefoot Beach (R-13 to
R-16) and the north end of Delnor-Wiggins (R-17 to R-19)) from 2005-2010 is
provided in Table 4.
Table 3:Barefoot Beach and Delnor-Wiggins Pass State Park sea turtle nesting,
2005-2010
I 2005 I 2006 [ 2007 _ 2008 I 2009 2010 l
BAREFOOT BEACH
Total Nests 72 56 40 75 59 87
Total False 67 55 33 85 50 90
Crawls
DELNOR-WIGGINS
Total Nests 15 10 18 17 22 20
Total False 46 12 20 33 36 20
Crawls
Total
Emergences 61 22 38 50 58 40
i
.)14)f,
EAC Meeting Q V
Page 13 of 15
Table 4: Sea turtle nesting adjacent to Wiggins Pass,2005-2010
2005 I 2006 I 2007 I 2008 I 2009 2010
BAREFOOT BEACH(R13-R16)
Total 13 5 3 16 14 24
Nests
Total
False 12 8 8 15 12 17
Crawls
DELNOR-WIGGINS(R17-RI9)
Total 9 1 8 6 5 13
Nests
Total
False 19 2 7 18 19 11
Crawls
Habitat for the gopher tortoise (Gopherus polyphemus), a State-listed species of
special concern, exists throughout the beach dune, coastal strand, and maritime
hammock of Barefoot Beach Preserve. Barefoot Beach is one of the remaining
few natural barrier islands along the southwest coast of Florida and is important
habitat for the gopher tortoise: a total of 712 burrows were recorded from June 13
through September 7 of 2009; 186 were recorded as Very Active; 277 were
recorded as Active; 76 were recorded as Inactive; 173 were abandoned (Table 5,
Figure 4). According to Sally Braem, there are about 30-40 active gopher tortoise
burrows in Delnor-Wiggins Pass State Park(pers. comm., 2011).
Table 5: Summary of gopher tortoise burrow observations for summer 2009
(data obtained from Margie Hamilton,gopher tortoise biologist for Barefoot Beach)
Size Class: Very Active Active Inactive
Adult 173 233 62
Sub Adult 6 34 13
Juvenile 6 9 1
Hatchling 1 1 0
Subtotals: 186 277 76
Abandoned: 173
Total Burrows: 712
The Barefoot Beach shoreline provides important habitat for several bird species,
including overwintering habitat for piping plovers (Townsend and Olson, 2007).
Shorebird surveys within Delnor-Wiggins have shown that many species of birds
utilize the shoreline for feeding or roosting, but no shorebirds have nested within
Delnor-Wiggins Pass State Park since least tern nest sites were last documented in
1986 and 1 987 (FDEP,2009; Sally Braem,pers. comm., 2011).No piping plovers
EAC Meeting 4t U V
Page 14 of 15
have been observed during shorebird surveys in Delnor-Wiggins Pass State Park
(Carolyn Shaw,pers. comm., 2011).
Manatees (Trichechus manatus latirostris) and bottle-nosed dolphins (Tursiops
truncatus) are common in the area, and have been observed within Wiggins Pass.
6. Conservation Measures
Construction will comply with all permit requirements that will result from
coordination with FDEP, Florida Fish and Wildlife Conservation Commission
(FWC), USACE, U.S. Fish and Wildlife Service (USFWS), and National Marine
Fisheries Service (NMFS). Construction activities will be kept under surveillance,
management, and control to minimize interference with, disturbance of, or
damage to wildlife resources, particularly threatened and endangered species,
within the project area. This project will also adhere to LDC section 3.04.02,
which contains protection measures for listed species.
Sea Turtles and Smalltooth Sawfish
Construction will adhere to the NMFS "Sea Turtle and Smalltooth Sawfish
Construction Conditions" during construction of this project. All attempts will be
made to place fill on the beach outside of nesting season.
Gopher Tortoises
Project construction will be in accordance with LDC subsection 3.04.02.A.
Manatees
Construction operations will comply with FWC's "2011 Standard Manatee
Conditions for In-Water Work"during construction of this project.
Birds
Shorebirds may be disturbed by construction activities and find quieter areas of
the beach to roost. Shorebird monitoring in and near the project area will be
conducted as required by the FWC.
Seagrass and Oyster Beds
Whenever feasible, turbidity curtains will be utilized to protect seagrass and
oyster beds in the work area from turbidity and sedimentation during construction.
Hardbottom Resources
Hardbottom monitoring will be conducted as required by FDEP.
VII. RECOMMENDATIONS
Staff recommends approval of ST-PL20120000168 "Wiggins Pass Maintenance
Dredging and Navigation Improvement Project".
C
EAC Meeting V
Page 15 of 15
to
PREPARED BY:
Az 642/20/2
STEPHEN LENBERGER DATE
SENIOR ENVIRONMENTAL SPECIALIST
LAND DEVELOPMENT SERVICES DEPARTMENT
STORMWATER AND ENVIRONMENTAL PLANNING SECTION
REVIEWED BY:
42.440 127/ 2d4- /
JERRY KURT
Z, P.E. DATE
LAND DEVELOPMENT SERVICES DEPARTMENT
MANAGER, STORMWATER AND ENVIRONMENTAL PLANNING SECTION
■
4 oG- 13 _ 2olZ
IAM D. LO' ' 1Z, Jr., '. . DATE
DIRECTOR
LAND DEVELOPMENT SERVICES DEPARTMENT
6/CA
STEVEN T. WILLIAMS DATE
ASSISTANT COUNTY ATTORNEY
OFFICE OF THE COLLIER COUNTY ATTORNEY
APPROVED BY:
/,-
NICK CA'AL' GUS A- DATE
ADMINISTRATOR
GROWTH MANAGEMENT DIVISION
\°I1
RESOLUTION NO. 12-
A RESOLUTION OF THE BOARD OF COUNTY COMMISSIONERS OF
COLLIER COUNTY, FLORIDA RELATING TO PETITION NUMBER
ST-PL2012-168 FOR A SPECIAL TREATMENT DEVELOPMENT
PERMIT TO DREDGE AND FILL ON STATE-OWNED PROPERTY IN
THE VICINITY OF WIGGINS PASS CHANNEL ZONED
AGRICULTURAL AND CONSERVATION WITH SPECIAL
TREATMENT OVERLAYS (A-ST AND CON-ST) IN SECTIONS 17, 18
AND 20, TOWNSHIP 48 SOUTH, RANGE 25 EAST, COLLIER COUNTY,
FLORIDA.
WHEREAS, the Legislature of the State of Florida in Chapter 125, Florida Statutes, has
conferred on all counties in Florida the power to establish, coordinate and enforce zoning and
such business regulations as necessary for the protection of the public; and
WHEREAS, the County pursuant thereto has adopted a Land Development Code (LDC)
(Ordinance No. 2004-41, as amended) which establishes regulations for the zoning of particular
geographic divisions of the County; and
WHEREAS, the Board of County Commissioners of Collier County has held a public
hearing after notice as in said regulations made and provided, and has considered the advisability
of allowing the dredging and filling on property as shown on the attached plans, Exhibit "A", in
an Agricultural Zoning District and Conservation Zoning District with Special Treatment
Overlays(A-ST and CON-ST)wherein said property is located; and
WHEREAS, all interested parties have been given opportunity to be heard by this Board
in public meeting assembled and the Board having considered all matters presented.
NOW, THEREFORE, BE IT RESOLVED BY THE BOARD OF COUNTY
COMMISSIONERS OF COLLIER COUNTY, FLORIDA,that:
Petition ST-PL2012-168 filed by Collier County with respect to property in the vicinity of
the Wiggins Pass channel is hereby approved for a Special Treatment Development Permit to
allow the dredging and filling on State-owned property as shown on the attached plans, Exhibit
"A", in an Agricultural Zoning District and Conservation Zoning District with Special Treatment
Overlays (A-ST and CON-ST) wherein said property is located, and subject to the Conditions of
Approval found in Exhibit "B". Exhibits "A" and "B" are attached hereto and incorporated
herein by reference.
BE IT FURTHER RESOLVED that this Resolution relating to Petition Number ST-
PL2012-168 be recorded in the minutes of this Board.
Wiggins Pass Maintenance, Dredging& 1 of 2
Navigation Improvement Project
ST-PL2012-168 —Rev. 8/30/12
01\tio\t)//
I f°
This Resolution adopted after motion, second and majority vote this day of
2012.
ATTEST: BOARD OF COUNTY COMMISSIONERS
DWIGHT E. BROCK, CLERK COLLIER COUNTY, FLORIDA
By:
,Deputy Clerk FRED W. COYLE, Chairman
Approved as to form
and Legal sufficiency
Heidi Ashton-Cicko
Managing Assistant County Attorney
Attachments: Exhibit A—Construction Plans
Exhibit B—Conditions of Approval
CPU 2-CPS-O 1 156\49
Wiggins Pass Maintenance, Dredging& 2 of 2
Navigation Improvement Project
ST-PL2012-168 —Rev. 8/30/12
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CONDITIONS OF APPROVAL
FOR
ST-PL2012-168
1. The dredge project be designed for boats with a three-foot maximum draft.
2. Construction activities be limited to outside of sea turtle nesting season.
C P\12-CPS-O 1 156\43
EXHIBIT B
Wiggins Pass Maintenance,Dredging&
Navigation Improvement Project
ST-PL2012-168
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PREPARED BY GIS/CAD MAPPING DEPARTMENT ��
GROWTH MANAGEMENT DIVISION /PLANNING AND REGULATION
DATE: 8/2012 FILE: WIGGINS PASS STDWG
COLLIER COUNTY GOVERNMENT 2800 NORTH HORSESHOE DRIVE ENGINEERING&ENVIRONMENTAL SERVICES DEPARTMENT NAPLES, FLORIDA 34104
*t(A(t °/
WWW.COLLIERGOV.NET (239) 252-2505
y,apr,
DEVELOPMENT PERMIT PETITION FOR SPECIAL TREATMENT DESIGNATED LAND
PETITION NO(AR)
PROJECT NAME
PROJECT NUMBER
DATE PROCESSED/DUE DATE For Staff Use Only
ASSIGNED PLANNER
On Site Inspection By:
Comments:
ABOVE TO BE COMPLETED BY STAFF
APPLICANT INFORMATION
NAME OF APPLICANT GARY MCALPIN,COLLIER COUNTY COASTAL ZONE MANAGEMENT
MAILING ADDRESS COLLIER COUNTY,3301 E.TAMIAMI TRAIL
TELEPHONE#(239) 530-5342 FAX#(239) 252-2950
E-MAIL ADDRESS: GARYMCALPIN @COLLIERGOV.NET
NAME OF OWNER(S) COLLIER COUNTY BOARD OF COMMISSIONERS AND TRUSTEES OF THE INTERNAL
IMPROVEMENT TRUST FUND(TIITF) OF FLORIDA
MAILING ADDRESS SEE ATTACHED
TELEPHONE# FAX#
E-MAIL ADDRESS:
C PERMIT INFORMATION
General Location:Wiggins Pass,Collier County
Legal Description of Property: The Applicant is seeking approval from State Lands to conduct this project on approx.
83.2 acres of sovereign submerged land.The legal property description will be provided once the channel alignment is
accepted.
Nature of Petition: Collier County proposes to conduct dredging activities and placement of fill in the nearshore marine
environment within Wiggins Pass and vicinity,which include Special Treatment overlays.We are addressing dredging in
OFW with FDEP as part of the State permitting process; it appears that the OFW and ST overlays are similar, if not the
same.
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A licant pP Date
\COI/
Wiggins Pass Maintenance Dredging and Navigation Improvement Project
(Petition Number ST-PL2012-168)
Environmental Data
Binders with environmental data provided external to Sire.
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Wiggins Pass Tidal Prism in the Four Channels
The hydraulics of Wiggin Pass cannot be determined with a causal observation. The shape of the
flood shoal and channel appears to show a dominate southern channel from Vanderbilt Lagoon,
but this flow is only about half that from the east. The east channel from the Cocohatchee River
is actually the dominate channel and the shape of the flood shoal is cause by another coastal
process.
Based on calculations through one full tide cycle,the contribution from the north, east and
south channels were determined during modeling. The flow from the north, east and south
channels contribute approximately 29.6%, 45.6% and 23.8%, respectively, based on absolute
tidal prism (volume of water). The figure below illustrates the flow in each respective channel. It
shows the tidal prism(cubic meters) versus hours of a tidal cycle. A cubic meter(M3) is equal to 35
cubic feet.
175,000 -
-West
150,000
—North
125,000 East
—South
100,000 -;4,
n y.;
c1 Y yi
75,000 ' 'd
• 50,000 y 111
M 25,000 t ..J1La . A 1 IA
cu
o it �G�
-• 25,000 l}��I Er
-50,000 '
u+ -75,000
-100,000
-125,000
-150,000 -
-175,000
0 3 6 9 12 15 18 21 24 27
Time(Hours)
Instantaneous Discharge (M3)
0)(1 ,4 ,
Ilksli v
The figure shown below is the inlet flood shoal and channel. The red arrows illustrate the
primary sand pathway into the inlet, which leads to growth of the flood shoal over many decades.
It is this growth of the flood shoal that has pushed the main flood channel north against Barefoot
Beach. In addition, the mouth of the south channel is dredged periodically to remove the eastern
deposition of these sands. During periods of the higher tide range and large river flows, the east
flow tries to cut a channel thru the flood shoal, but does not have enough persistence to succeed.
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Principal Sand Pathway to Flood Shoal
In general, the combined north and south channel flows are nearly equal and counter act each
other, while the eastern flow dominates with almost 50%of the combine flow.
The discharge from the Cocohatchee River during the wet (tropical) weather season can
contribute significant flow to the tidal prism.
The new design will have a smaller dredged cross section, but will maintain a deeper navigation
depth after 4 years. The average ebb channel width decreases from 250 feet to 200 feet between
the 2000 permit dimension and the proposed new channel, and the dredge depth will be a foot
shallower. Ultimately this will produce a straighter channel with almost a 6.8 foot NAVD depth
remaining after 4 years. A historic comparison of the channel dimension is illustrated in the table
and figures below.
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w
w
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o� LI I f 1 I I I f I i I I I 1 I of
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FIGURE 34
WIGGINS PASS
DESIGN CHANNEL CROSS-SECTION
166
COASTAL PLANNING & ENGINEERING, INC.